Emerson Process Management 2051CF manual Power Supply for 4-20 mA Hart

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Quick Installation Guide

00825-0100-4101, Rev EA June 2010

Rosemount 2051

Power Supply for 4-20 mA HART

Transmitter operates on 10.5 - 42.4 Vdc. The dc power supply should provide power with less than two percent ripple.

Figure 8. Load Limitation

Maximum Loop Resistance = 43.5 * (Power Supply Voltage – 10.5)

Load (Ohms)

1387

1000

500Operating

Region

0
10.5	20	30

Voltage (V dc)	42.4

The Field Communicator requires a minimum loop resistance of 250Ω for communication.

The total resistance load is the sum of the resistance of the signal leads and the load resistance of the controller, indicator, and related pieces. Note that the resistance of intrinsic safety barriers, if used, must be included.

Power Supply for 1-5 Vdc HART Low Power

Low power transmitters operate on 9–28 Vdc. The dc power supply should provide power with less than two percent ripple. The Vout load should be 100 kW or greater.

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Contents Rosemount 2051CF Series Flowmeter Transmitter Quick Installation GuideConduit/Cable Entries Explosions could result in death or serious injuryProcess leaks may cause harm or result in death Electrical shock can result in death or serious injuryFlow Mount the TransmitterApplications Optional Mounting Brackets Common Transmitter Assemblies Bolting ConsiderationsPtfe Based Rings with Flange AdaptersFlange Adapter RingSET the Jumpers Consider Housing RotationInline Gage Transmitter Orientation MA Hart RL ≥ 250Ω Connect the Wiring and PowerWiring Power Supply for 1-5 Vdc Hart Low Power Power Supply for 4-20 mA HartFunction MA Hart Verify ConfigurationZero Trim Using the Field CommunicatorUsing the Transmitter Zero Adjustment Buttons Trim the TransmitterConfiguration Safety Instrumented SystemsInstallation Reference Operation and MaintenanceEuropean Directive Information Safety Failure ValuesProduct Certifications Approved Manufacturing LocationsEuropean Certifications Hart ProtocolHazardous Locations Certifications North American CertificationsRosemount IECEx Certifications CCoE Certifications Tiis CertificationsInmetro Certifications E5 and I5 combination Combinations of CertificationsE1, I1, N1, and ND combination E4 and I4 combinationRosemount Rosemount Rosemount

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